Plan the full steak-frites basket before you leave: steak, potatoes, butter and salad can land cheaper at one Cologne store or across two stops, but the lower shelf prices only matter if the second stop fits your route. Check the current Friday offers at Rewe, Aldi and Lidl, then compare the full basket with distance included before choosing.
Start with the exact dinner list
A useful comparison begins with quantities. “Steak-frites” is too broad for a fair price check because a 250 g rump steak, a larger pack of beef, frozen fries and fresh potatoes create very different totals.
For two people, write down the dinner you actually plan to make:
- 2 steaks, with the cut and approximate weight you want.
- 1 kg potatoes, or one bag of frozen fries if that is the plan.
- Butter, including the pack size you will use.
- One salad, plus any dressing ingredients you need.
- Salt, pepper, oil and sauces only if you need to buy them this week.
Keep substitutions visible. Aldi or Lidl may have a good offer on a different steak cut, while Rewe may have the specific cut you wanted. A cheaper basket is only useful if dinner still looks like dinner.
Check this Friday’s offer dates first
Weekly offers have start and end dates. Confirm that each steak, potato, butter and salad price applies on Friday, at the Cologne branch you can reach. A catalogue price that ended on Thursday does not belong in Friday’s total.
For each retailer, note:
- The product name and pack size.
- The offer price and any stated conditions.
- The branch location.
- Whether the offer is available for the whole week or only on selected days.
- Any item that has no close match.
This is where a single discounted item can distort the decision. Lidl may have the lowest potato price, but if its steak is unavailable or comes in a pack that leaves you with twice as much meat as you need, compare the amount you will actually buy. The Five Discounted Items That Can Hide a Higher Grocery Bill covers the same trap from the wider basket angle.
Compare whole baskets, not four winning items
Make three one-store totals first: Rewe, Aldi and Lidl. Each total should include every item that you can match at that store.
Then test only realistic two-store splits. For a Cologne Friday dinner, that might mean Aldi plus Rewe if they are on the same route home, or Lidl plus Rewe if you need the wider choice at Rewe. There is no value in adding a third shop for a few cents.
Use a simple comparison table:
| Plan | What to include | Decision test | |---|---|---| | Rewe only | All four dinner components from one nearby Rewe | Best when time and exact choice matter | | Aldi only | Aldi equivalents for the full list | Best when the basket is complete and the branch is convenient | | Lidl only | Lidl equivalents for the full list | Best when its current offers cover the meal | | Discount store plus Rewe | Low-cost staples from Aldi or Lidl, specific steak or missing item from Rewe | Worth considering when both stops are genuinely close together |
The key number is the basket total, not the lowest steak price. A lower-priced steak does little for the dinner budget if butter, potatoes and salad cost more there, or if you have to add a separate supermarket stop for the rest.
Put travel into the calculation
A two-store plan has a real cost: extra kilometres, extra time and the chance that Friday traffic turns a quick shop into a longer errand. Cologne routes are rarely as clean as a map makes them look at peak time.
Set a personal threshold before looking at the results. For example, decide that a second stop must save enough to feel worthwhile for the extra distance, parking and queue. The threshold will differ if you are walking, cycling, using public transport or already passing both stores.
A second stop usually makes sense when the stores are close together, the discount store covers most of the basket, and Rewe fills a specific gap. One store is often the better plan when the price difference is small or the split sends you in opposite directions.
Distance should sit next to the total price. A plan that looks cheapest on products alone can become the least practical choice once you add a detour across town.
Handle missing matches without guessing
Do not force a price match when the products differ too much. A basic mixed salad bag and a premium prepared salad are different purchases. The same applies to steak quality, origin, cut and weight.
Mark unmatched items separately, then decide whether to accept a substitution. If you choose a lower-priced alternative, record the change plainly: “sirloin instead of rump steak” or “frozen fries instead of fresh potatoes.” That keeps the comparison honest and prevents the total from promising a dinner you did not want to cook.
Current weekly offers also change. Recheck the basket on Friday morning if you built the list earlier in the week, especially where an offer has limited availability.
Make the Friday decision before the trip
Build the list, compare the complete one-store options, then add one or two nearby split plans. Choose the plan that gives you the dinner you want at a total and travel distance you are comfortable with.
For Friday, start with the nearest Rewe, Aldi and Lidl branches you would realistically visit. Add the exact steak, potatoes, butter and salad to one list, review the current offers, and keep the second stop only if its basket saving clears your own convenience threshold.
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